EP1111765B1 - Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur - Google Patents

Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur Download PDF

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Publication number
EP1111765B1
EP1111765B1 EP99830799A EP99830799A EP1111765B1 EP 1111765 B1 EP1111765 B1 EP 1111765B1 EP 99830799 A EP99830799 A EP 99830799A EP 99830799 A EP99830799 A EP 99830799A EP 1111765 B1 EP1111765 B1 EP 1111765B1
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EP
European Patent Office
Prior art keywords
terminal
voltage
input
input terminal
output terminal
Prior art date
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Expired - Lifetime
Application number
EP99830799A
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English (en)
French (fr)
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EP1111765A1 (de
Inventor
Vincenzo Randazzo
Natale Aiello
Atanasio La Barbera
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STMicroelectronics SRL
Original Assignee
STMicroelectronics SRL
SGS Thomson Microelectronics SRL
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Priority to EP99830799A priority Critical patent/EP1111765B1/de
Priority to DE69927990T priority patent/DE69927990T2/de
Priority to US09/747,171 priority patent/US6349048B2/en
Publication of EP1111765A1 publication Critical patent/EP1111765A1/de
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Publication of EP1111765B1 publication Critical patent/EP1111765B1/de
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53846—Control circuits
    • H02M7/53862—Control circuits using transistor type converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
    • H02M3/3382—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement in a push-pull circuit arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53832—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53846—Control circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
    • H05B41/2828—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage using control circuits for the switching elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention refers to a voltage converter circuit having a self-oscillating half-bridge structure.
  • voltage converter circuits are used which generally have a self-oscillating half-bridge configuration.
  • a voltage converter circuit 1 of the above indicated type is shown in Figure 1 and comprises a first input terminal 2a and a second input terminal 2b (the second terminal 2b being connected to ground), between which an input voltage V in is supplied, and a first output terminal 3a and a second output terminal 3b, between which an output voltage V out is supplied.
  • a capacitive divider 4 is connected between the input terminals 2a, 2b and comprises a first capacitor 5 having a capacitance C 1 and a second capacitor 6 having a capacitance C 2 , the capacitors 5 and 6 being connected in series.
  • first switch 7 Connected between the input terminals 2a, 2b are also a first switch 7 and a second switch 8.
  • the first switch 7 is connected between the first input terminal 2a and the first output terminal 3a
  • the second switch 8 is connected between the first output terminal 3a and the second input terminal 2b.
  • a resonant load 10 comprising a lamp 12 connected in parallel to a capacitor 13 and connected in series to an induction coil 14.
  • the switches 7, 8 have a control terminal each, 17 and 18 respectively, which are connected to output terminals of an integrated circuit 15 which controls in phase opposition opening or closing of the switches 7, 8.
  • the integrated circuit 15 controls closing of the first switch 7 or opening of the second switch 8
  • the first output terminal 3a is connected to the first input terminal 2a; instead, when the integrated circuit 15 controls opening of the first switch 7 and closing of the second switch 8, the first output terminal 3a is connected to the second input terminal 2b.
  • an output voltage V out is obtained alternating at a frequency determined by switching of the switches 7, 8 and controlled by the integrated circuit 15.
  • Voltage converters are moreover known that use a transformer to generate or synchronize oscillations of the voltage supplied to the load. Also these converters are disadvantageous in that the transformer entails an increase in costs.
  • US-A-5 410 220 discloses a control circuit for driving a discharge lamp wherein the power element of each half-bridge is turned on when the absolute voltage across the power element falls below a threshold voltage of a controlling switch connected between its gate and source terminals. Thereby, a fixed voltage is applied to one of the power elements at time, that switches on.
  • a capacitor is connected between a drain terminal of a respective power element and the control terminal of the respective controlling switch to speed up switching off of the respective power element.
  • the technical problem of the present invention is to overcome the limits and drawbacks referred to above.
  • a voltage converter circuit is provided, as specified in Claim 1.
  • Figure 2 shows a voltage converter circuit 20 which has a self-oscillating half-bridge configuration and has a first input terminal 21a and a second input terminal 21b, between which an input voltage V in is applied, and a first output terminal 22a and a second output terminal 22b, between which an output voltage V out is present.
  • the input voltage V in is a continuous voltage or a low frequency alternating voltage generated by a rectified network, not shown in Figure 2.
  • a capacitive divider 23 is connected between the first input terminal 21a and the second input terminal 21b, and includes a first capacitor 24 having a capacitance C 4 , and a second capacitor 25 having a capacitance C 3 which has the same value as the capacitance C 4 .
  • the capacitors 24, 25 are connected in series.
  • the first capacitor 24 is connected between the first input terminal 21a and the second output terminal 22b
  • the second capacitor 25 is connected between the second output terminal 22b and the second input terminal 21b.
  • a first resistor 35 having a resistance R 1 and a third capacitor 36 having a capacitance C 1 are connected in series between the first input terminal 21a and the first output terminal 22a.
  • the first resistor 35 is connected between the first input terminal 21a and a first intermediate node 37
  • the third capacitor 36 is connected between the first intermediate node 37 and the first output terminal 22a.
  • a second resistor 40 having a resistance R 2 and a fourth capacitor 42 having a capacitance C 2 are connected in series between the first input terminal 21a and the second input terminal 21b.
  • the second resistor 40 is connected between the first input terminal 21a and a second intermediate node 43
  • the fourth capacitor 42 is connected between the second intermediate node 43 and the second input terminal 21b.
  • the voltage converter circuit 20 also comprises a first circuit block 27 and a second circuit block 28.
  • the first circuit block 27 has a first terminal, a second terminal, and a third terminal connected, respectively, to the first input terminal 21a, to the first output terminal 22a, and to the first intermediate node 37;
  • the second circuit block 28 has a first terminal, a second terminal, and a third terminal connected, respectively, to the first output terminal 22a, to the second input terminal 21b, and to the second intermediate node 43.
  • An electrical load 30 is connected between the first output terminal 22a and the second output terminal 22b and comprises, for example, a lamp 31 connected in parallel to a resonant capacitor 32 having a capacitance C R , and in series to a resonant induction coil 33 having an inductance L R .
  • a third resistor 45 having a resistance R 3 is connected between the first output terminal 22a and the second input terminal 21b.
  • the first circuit block 27 comprises a first power switch 60 (for example a power PMOS) having a first terminal and a second terminal connected, respectively, to the first input terminal 21a and to the first output terminal 22a, and a control terminal 61.
  • a first freewheeling diode 62 is connected between the first terminal and the second terminal of the first power switch 60.
  • a first drive circuit 63 is connected between the first intermediate node 37 and the first output terminal 22a, and has a first input terminal 64 and a second input terminal 65, and an output terminal connected to the control terminal 61 of the first power switch 60.
  • the first circuit block 27 also comprises a first oscillator circuit 66 including a first operational amplifier 67 which has an inverting input terminal and a non-inverting input terminal.
  • the inverting input terminal is connected to the first output terminal 22a via a first synchronization capacitor 68 having a capacitance C'.
  • the non-inverting input terminal is connected to the first output terminal 22a via a first voltage source 73 supplying a reference voltage V ref1 .
  • the first operational amplifier 67 also has an output terminal connected to the second input terminal 65 of the first drive circuit 63.
  • a first current source 74 supplying a reference current I' is connected between the first intermediate node 37 and the inverting input terminal of the first operational amplifier 67.
  • a first voltage sensor 70 for example a capacitor, is connected between the first input terminal 21a and a first circuit node 71.
  • the first circuit node 71 is connected to the inverting input terminal of the first operational amplifier 67 and to the first input terminal 64 of the first drive circuit 63.
  • a Zener diode 72 has its cathode connected to the first intermediate node 37 and its anode connected to the first output terminal 22a.
  • the second circuit block 28 comprises a second power switch 80 having a first terminal connected to the first output terminal 22a, a second terminal connected to the second input terminal 21b, and a control terminal 81.
  • a second freewheeling diode 82 is connected between the first terminal and the second terminal of the second power switch 80.
  • a second drive circuit 83 is connected between the second intermediate node 43 and the second input terminal 21b, and has a first input terminal 84 and a second input terminal 85, and an output terminal connected to the control terminal 81 of the second power switch 80.
  • the second circuit block 28 also comprises a second oscillator circuit 86 including a second operational amplifier 87 which has an inverting input terminal and a non-inverting input terminal.
  • the inverting input terminal is connected to the second input terminal 21b via a second synchronization capacitor 88 having a capacitance C".
  • the non-inverting input terminal is connected to the second input terminal 21b via a second source generator 93 supplying a reference voltage V ref2 .
  • the second operational amplifier 87 also has an output terminal connected to the second input terminal 85 of the second drive circuit 83.
  • a second current source 94 supplying a reference current I" is connected between the second intermediate node 43 and the inverting input terminal of the second operational amplifier 87.
  • a second voltage sensor 90 for example a capacitor, is connected between the first output terminal 22a and a second circuit node 91.
  • the second circuit node 91 is connected to the inverting input terminal of the second operational amplifier 87 and to the first input terminal 84 of the second drive circuit 83.
  • a dynamic voltage regulator 92 is connected between the second intermediate node 43 and the second input terminal 21b, and comprises, for instance, a Zener diode 98 having its anode connected to the second input terminal 21b and its cathode connected to the second intermediate node 43 via a switching element 99 which has a control terminal 99a connected to the second drive circuit 83.
  • the second drive circuit 83 controls turning on of the switching element 99 in the turning off phase of the second power switch 80.
  • the second circuit block 28 further comprises a DIAC device 96 connected between the second intermediate node 43 and the control terminal 81 of the second power switch 80.
  • the values of the capacitances C' and C" are chosen so that they are equal to one another, as are the reference voltages V ref1 and V ref2 , and the reference currents I' and I".
  • the first power switch 60 and the second power switch 80 are off, and the input voltage V in and the output voltage V out are equal to a ground voltage (the voltage on the second input terminal 21b).
  • the input voltage V in is applied between the input terminals 21a and 21b (instant t 0 )
  • the first capacitor 24 and the second capacitor 25, which have equal capacitance, are charged, thereby the output voltage V out is brought to a value equal to V in /2 (instant t 1 ).
  • the first resistor 35 and the third resistor 45 are flown by a current that charges the third capacitor 36 at a voltage V C1 , the maximum value of which is regulated via the Zener diode 72, and the second resistor 40 is flown by a current that charges the fourth capacitor 42 at a voltage V C2 .
  • the voltages V C1 and V C2 are, respectively, the supply voltages of the first circuit block 27 and of the second circuit block 28, supplied to the first intermediate node 37 and to the second intermediate node 43, respectively.
  • the first resistor 35, the second resistor 40, and the third resistor 45, as well as the third capacitor 36 and the fourth capacitor 42, are sized so that the charge time constant of the third capacitor 36 is lower than the charge time constant of the fourth capacitor 42. In this way, when the second power switch 80 turns on, the third capacitor 36 is already charged at the voltage V C1 .
  • first voltage sensor 70 and the second voltage sensor 90 which confirm, respectively, the OFF state of the first power switch 60 and the ON state of the second power switch 80.
  • the second voltage sensor 90 translates the negative variation of the output voltage V out into a discharge current of the second synchronization capacitor 88.
  • the voltage V C across the second synchronization capacitor 88 rapidly reduces to zero, and the second operational amplifier 87, via the second drive circuit 83, confirms conduction of the second power switch 80.
  • the output voltage V out then assumes a value equal to the ground voltage.
  • the second synchronization capacitor 88 starts again to get charged by the second current source 94. In this step, the fourth capacitor 42 is discharged to ground.
  • the second operational amplifier 87 switches and, via the second drive circuit 83, turns off the second power switch 80.
  • the first voltage sensor 70 causes turning on of the first power switch 60, and the second voltage sensor 90 confirms the OFF state of the second power switch 80.
  • the first voltage sensor 70 translates the negative variation of voltage V in - V out into a discharge current of the first synchronization capacitor 68, just as has been described above for the second synchronization capacitor 88.
  • the voltage V C across the first synchronization capacitor 68 rapidly decreases to zero, and the first operational amplifier 67 switches, so enabling the first power switch 60 to conduct via the first drive circuit 63.
  • the output voltage V out then assumes a value equal to that of the input voltage V in (instant t 4 ).
  • the ON state of the first power switch 60 persists until the voltage V C equals the reference voltage V ref (instant t 5 ) ; then the first operational amplifier 67 switches, and the first power switch 60 is turned off.
  • the voltage converter circuit 20 continues to oscillate between the two conditions just described, bringing the output voltage V out alternately to a value close to the input voltage V in on the first input terminal 21a and to a value close to that of the ground voltage, present on the second input terminal 21b. In this way, an output voltage V out is obtained having a square waveform with a preset frequency.
  • the first synchronization capacitor 68 and the first current source 74 define a first oscillating voltage source.
  • the voltage V C across the first synchronization capacitor 68 is a first oscillating voltage having the waveform shown in Figure 4.
  • the second synchronization capacitor 88 and the second current source 94 define a second oscillating voltage source.
  • the voltage across the second synchronization capacitor 88 is a second oscillating voltage having a waveform similar to that of voltage V C .
  • both circuit blocks 27, 28 have same sizes, and thus have the same reference voltage values, equal current sources 74, 94, and equal synchronization capacitors 68, 88
  • the voltage converter circuit 20 conducts for the same period of time in the two conditions described above. If a duration other than 50% of the two half periods is desired, it is sufficient to differently size the capacitances of the synchronization capacitor 68, 88.
  • a delay element (not shown in Figure 3) is present inside each drive circuit 63, 83 and is appropriately controlled by the corresponding voltage sensor 70, 90 to delay turning on of the corresponding power switch 60, 80. Thereby, turning on of the power switch 60, 80 is prevented when the voltage across it is still high.
  • the advantages of the voltage converter circuit 20 are the following. First, for a same performance, the voltage converter circuit according to the invention requires a smaller number of components, and thus has lower manufacturing costs than the prior art circuit described previously.
  • the voltage converter circuit according to the invention prevents simultaneous conduction of the two power switches 60, 80 in any operating condition.
  • the voltage converter circuit 20 enables conduction of each power switch 60, 80 only when the respective voltage sensor 70, 90 detects a negative variation of the voltage at the respective input terminal, as due to the turning off of the other power switch.
  • the voltage converter circuit according to the invention can be used for driving any type of load.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Claims (10)

  1. Spannungswandlerschaltung (20) mit einer selbstschwingenden Halbbrückenkonfiguration, welche einen eine Eingangsspannung (Vin) empfangenden ersten Eingangsanschluss (21a) und zweiten Eingangsanschluss (21b) und einen eine Ausgangsspannung (Vout) speisenden ersten Ausgangsanschluss (22a) und zweiten Ausgangsanschluss (22b) sowie Folgendes aufweist:
    einen ersten Leistungsschalter (60) mit einem ersten Leitungsanschluss und einem zweiten Leitungsanschluss, welche am ersten Eingangsanschluss (21a) bzw. ersten Ausgangsanschluss (22a) angeschlossen sind, und ein Steuerterminal bzw. -pol (61);
    einen zweiten Leistungsschalter (80) mit einem ersten Leitungsanschluss und einem zweiten Leitungsanschluss, welche am ersten Ausgangsanschluss (22a) bzw. zweiten Eingangsanschluss (21b) angeschlossen sind, und ein Steuerterminal bzw. -pol (81);
    eine erste Steuerschaltung (63) mit einem Aktivierungseingang (65) und einem Ausgang (61), welche am Steuerterminal (61) des ersten Leistungsschalters (60) angeschlossen sind; und
    eine zweite Antriebsschaltung (83) mit einem Aktivierungseingang (85) und einem Ausgang (81), welche am Steuerterminal (81) des zweiten Leistungsschalters (80) angeschlossen sind;
    gekennzeichnet durch:
    ein erstes Element (70) eines Differentialspannungssensors mit einem am ersten Eingangsanschluss (21a) angeschlossenen ersten Abtastanschluss und einem zweiten Abtastanschluss, welcher durch die erste Antriebsschaltung (63) am Steuerterminal (61) des ersten Leistungsschalters (60) und am zweiten Ausgangsanschluss (22a) angeschlossen ist, wobei das erste Spannungssensorelement (70) an dem ersten Abtastanschluss eine zeitliche Abweichung in eine im Voraus eingestellte erste Richtung der Spannung zwischen dem ersten Eingangsanschluss (21a) und dem ersten Ausgangsanschluss (22a) erfasst und an dem zweiten Abtastanschluss ein erstes Aktivierungspotential für den ersten Leistungsschalter (60) erzeugt, welches zur ersten Steuerschaltung (63) geführt wird; und
    ein zweites Element (90) eines Differentialspannungssensors mit einem ersten Abtastsensor bzw. -anschluss, welcher am ersten Ausgangsanschluss (22a) angeschlossen ist, und einem zweiten Abtastanschluss, welcher durch die zweite Steuerschaltung (83) am Steuerterminal (81) des zweiten Leistungsschalters (80) und am zweiten Eingangsanschluss (21b) angeschlossen ist, wobei das zweite Spannungssensorelement (90) auf dem ersten Abtastanschluss eine zeitliche Abweichung in eine im Voraus eingestellte zweite Richtung der Spannung zwischen dem ersten Ausgangsanschluss (22a) und dem zweiten Eingangsanschluss (21b) erfasst und auf dem zweiten Abtastanschluss ein zweites Aktivierungspotential für den zweiten Leistungsschalter (80) erzeugt, welches zur zweiten Steuerschaltung (83) gespeist wird.
  2. Spannungswandlerschaltung nach Anspruch 1, dadurch gekennzeichnet, dass die Abweichung in eine erste Richtung und die Abweichung in eine zweite Richtung eine Spannungsabnahme umfassen.
  3. Spannungswandlerschaltung nach Anspruch 1 oder 2, zudem gekennzeichnet durch:
    eine erste Oszillatorschaltung (66), welche zwischen dem zweiten Abtastanschluss des ersten Spannungssensorelements (60) und dem ersten Ausgangsanschluss (22a) angeschlossen ist und einen durch die erste Antriebsschaltung (63) am Steuerterminal (61) des ersten Leistungsschalters (60) angeschlossenen Ausgangsanschluss aufweist und einen ersten Freigabeimpuls für den ersten Leistungsschalter (60) erzeugt, solange die Spannung auf dem zweiten Abtastanschluss des ersten Spannungssensorelements (70) geringer als ein im Voraus eingestellter erster Wert ist; und
    eine zweite Oszillatorschaltung (86), welche zwischen dem zweiten Abtastanschluss des zweiten Spannungssensorelements (90) und dem zweiten Eingangsanschluss (21b) angeschlossen ist und einen am Bediengerät (81) des zweiten Leistungsschalters (80) angeschlossenen Ausgangsanschluss aufweist und durch die zweite Antriebsschaltung (83) einen zweiten Freigabeimpuls für den zweiten Leistungsschalter (80) erzeugt, solange die Spannung auf dem zweiten Abtastanschluss des zweiten Spannungssensorelements (90) geringer als ein im Voraus eingestellter zweiter Wert ist.
  4. Spannungswandlerschaltung nach Anspruch 3, dadurch gekennzeichnet, dass:
    die erste Oszillatorschaltung (66) einen ersten Operationsverstärker (67) mit einem ersten Eingangsschluss, einem zweiten Eingangsanschluss und einem Ausgangsanschluss, und eine erste schwingende Spannungsquelle (68, 74, 73) aufweist,
    wobei der erste Eingangsanschluss des ersten Operationsverstärkers (67) am zweiten Abtastanschluss des ersten Spannungssensorelements (70) angeschlossen ist, der zweite Eingangsanschluss des zweiten Operationsverstärkers (67) eine erste Vergleichsspannung (Vref1) empfängt und der Ausgangsanschluss des zweiten Operationsverstärkers (67) am Ausgangsanschluss der ersten Oszillatorschaltung (66) angeschlossen ist,
    die erste schwingende Spannungsquelle (68, 74, 73) zwischen dem zweiten Abtastanschluss des ersten Spannungssensorelements (70) und dem ersten Ausgangsanschluss (22a) angeschlossen ist und eine erste schwingende Spannung erzeugt, welche zwischen einem ersten Wert und einem zweiten Wert bei Abwesenheit des ersten Aktivierungspotentials zunimmt und nach dem Empfangen des ersten Aktivierungspotentials vom zweiten Wert auf den ersten Wert schaltet; und
    die zweite Oszillatorschaltung (86) einen zweiten Operationsverstärker (87) mit einem ersten Eingangsanschluss, einem zweiten Eingangsanschluss und einem Ausgangsanschluss, und eine zweite schwingende Spannungsquelle (88, 93, 94) aufweist,
    wobei der erste Eingangsanschluss des zweiten Operationsverstärkers (87) am zweiten Abtastanschluss des zweiten Spannungssensorelements (90) angeschlossen ist, der zweite Eingangsanschluss des zweiten Operationsverstärkers (87) eine zweite Vergleichsspannung (Vref2) empfängt und der Ausgangsanschluss des zweiten Operationsverstärkers (87) am Ausgangsanschluss der zweiten Oszillatorschaltung (86) angeschlossen ist,
    die zweite Schwingspannungsquelle (88, 93, 94) zwischen dem zweiten Abtastanschluss des zweiten Spannungssensorelements (90) und dem zweiten Eingangsanschluss (21b) angeschlossen ist und eine zweite schwingende Spannung erzeugt, welche zwischen einem dritten Wert und vierten Wert bei Abwesenheit des zweiten Aktivierungspotentials zunimmt und nach dem Empfangen des Aktivierungspotentials vom vierten Wert auf den dritten Wert schaltet.
  5. Spannungswandlerschaltung nach Anspruch 4, dadurch gekennzeichnet, dass:
    die erste Schwingspannungsquelle (68, 74, 73) einen ersten Speiseeingang (37), welcher eine erste Versorgungsspannung (VC1) empfängt; eine erste Stromquelle (74), welche zwischen dem ersten Speiseeingang (37) und dem zweiten Abtastanschluss des ersten Spannungssensorelements (70) angeschlossen ist; und ein erstes kapazitives Element (68) aufweist, welches zwischen dem zweiten Abtastanschluss des ersten Spannungssensorelements (70) und dem ersten Ausgangsanschluss (22a) angeschlossen ist; und
    die zweite Schwingspannungsquelle (88, 93, 94) einen zweiten Speiseeingang (43), welcher eine zweite Versorgungsspannung (VC2) empfängt; eine zweite Stromquelle (94), welche zwischen dem zweiten Speiseeingang (43) und dem zweiten Abtastanschluss des zweiten Spannungssensorelements (90) angeschlossen ist; und ein zweites kapazitives Element (88) aufweist, welches zwischen dem zweiten Abtastanschluss des zweiten Spannungssensorelements (90) und dem zweiten Eingangsanschluss (21b) angeschlossen ist.
  6. Spannungswandlerschaltung nach Anspruch 5, zudem gekennzeichnet durch:
    einen statischen Spannungsregler (72), welcher zwischen dem ersten Speiseeingang (37) und dem ersten Ausgangsanschluss (22a) angeschlossen ist; und
    einen dynamischen Spannungsregler (92), welcher zwischen dem zweiten Speiseeingang (43) und dem zweiten Eingangsanschluss (21b) angeschlossen ist.
  7. Spannungswandlerschaltung nach Anspruch 5 oder 6, zudem gekennzeichnet durch ein erstes und zweites Widerstandselement (35, 40) und ein drittes und viertes kapazitives Element (36, 42),
    wobei das erste Widerstandselement (35) zwischen dem ersten Eingangsanschluss (21a) und dem ersten Speiseeingang (37) und das dritte kapazitive Element (36) zwischen dem ersten Speiseeingang (37) und dem ersten Ausgangsanschluss (22a) angeschlossen ist,
    das zweite Widerstandselement (40) zwischen dem ersten Eingangsanschluss (21a) und dem zweiten Speiseeingang (43) angeschlossen ist, und
    das vierte kapazitive Element (42) zwischen dem zweiten - Speiseeingang (43) und dem zweiten Eingangsanschluss (21b) angeschlossen ist.
  8. Spannungswandlerschaltung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das erste Spannungssensorelement (70) und zweite Spannungssensorelement (90) ein entsprechendes kapazitives Element beinhalten.
  9. Spannungswandlerschaltung nach einem der vorangehenden Ansprüche, zudem gekennzeichnet durch einen kapazitiven Teiler (23), welcher zwischen dem ersten Eingangsanschluss (21a) und dem zweiten Eingangsanschluss (21b) angeschlossen ist und einen am zweiten Ausgangsanschluss (22b) angeschlossenen Zwischenknoten aufweist.
  10. Spannungswandlerschaltung nach einem der Ansprüche 3-7, wobei die erste Antriebsschaltung (63) am Ausgangsanschluss der ersten Oszillatorschaltung (66) und die zweite Steuerschaltung (83) am Ausgangsanschluss der zweiten Oszillatorschaltung (86) angeschlossen ist.
EP99830799A 1999-12-24 1999-12-24 Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur Expired - Lifetime EP1111765B1 (de)

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EP99830799A EP1111765B1 (de) 1999-12-24 1999-12-24 Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur
DE69927990T DE69927990T2 (de) 1999-12-24 1999-12-24 Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur
US09/747,171 US6349048B2 (en) 1999-12-24 2000-12-21 Voltage converter circuit having a self-oscillating half-bridge structure

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EP99830799A EP1111765B1 (de) 1999-12-24 1999-12-24 Spannungsumrichter mit einer selbstschwingenden Halbbrücke nstruktur

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EP1111765A1 (de) 2001-06-27
US6349048B2 (en) 2002-02-19
US20010015902A1 (en) 2001-08-23
DE69927990T2 (de) 2006-08-03
DE69927990D1 (de) 2005-12-01

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